Custom Solutions

Designed & manufactured to meet requirements of original equipment manufacturers worldwide.

Made in U.S.A.

Designed & manufactured in Eau Claire, WI, U.S.A.

Direct Customer Support

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Our Products

Senasys manufactures a variety of Bi-Metal Snap Disc Thermostat products, including 1/2″ and 3/4″ types, as well as a variety of thermocouples and other temperature solutions with short lead times. Choose an option below to learn more.

Bi-Metal Snap Disc Thermostats
1/2″ Bi-Metal Snap Disc Thermostats
Three Quarter Inch Auto Reset Snap Disc Thermostats
3/4″ Bi-Metal Snap Disc Thermostats
Other Products


Common applications

Learn more about how our snap disc thermostats are used.


Your questions, answered.


Find out what’s new at Senasys!


We are always looking for our customer’s feedback. If you’d like to leave us a review to be posted online, please email us at

The local appliances part store told me they’d have to order a replacement part from China for $71. I laughed out their door and was extremely happy to find Senasys, a business located in Wisconsin offering a higher quality product for a quarter of the price.

End User

We appreciate how quickly Senasys responds to our orders, and their lead times for our 1/2″ bi-metal thermostats!


Senasys is always able to answer questions in regards to the bi-metal thermostats we purchase. Their quality is great, with fast lead times and great pricing. 


Senasys is a great company to work with! As a distributor of parts that support the HVAC industry it’s hard for us to measure our supply & demand at times. Senasys is always flexible with allowing us to make changes to our orders to meet our customer’s needs.



Prefer to work with a distributor, visit one of our partners websites below.

Our Brands

Presair pneumatic switches

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    Our office hours are

    Monday – Friday

    8 a.m. to 4 p.m. CST


    1435 International Drive

    Eau Claire, WI 54701 U.S.A.

    +1 (715) 831-6353